JP2552777Y2 - Lid for underground structures - Google Patents

Description

[Detailed description of the invention]

[0001]

This invention makes it possible to open and close the opening between the ground and underground buried objects, underground structure facilities, underground facilities equipment, wiring and piping, etc. in sewage, water supply, gas and electric power communication. The present invention relates to a lid for an underground structure to be closed.

[0002]

2. Description of the Related Art Hitherto, a hinge having a receiving frame and a lid body for closing an opening of the receiving frame so as to be openable and closable is provided on a receiving seat provided on an inner surface of the receiving frame. Among the lids for underground structures such as manhole lids that are inserted and connected, as a configuration in which the seat provided on the receiving frame is detachable,
For example, Japanese Utility Model Application Laid-Open No. 62-172746,
BACKGROUND ART A moving hinge mechanism for an underground structure described in JP 190745 or the like is known. In the above-mentioned conventional moving hinge mechanism for an underground structure, the engaging portion of the retaining ring is engaged with the positioning portion provided on the inner peripheral edge of the frame, and a bolt is inserted through the engaging portion and the frame. The retaining ring is fixed to the inner peripheral edge of the frame by tightening. Then, if necessary, the opening / closing direction of the lid can be changed by changing the fixing position of the retaining ring in the frame.

[0003]

However, according to the above-described conventional structure, since the retaining ring cannot be attached to or detached from the frame without loosening the bolts or the like, after the installation of the frame is completed. However, the direction of the lid could not be easily changed, and in particular, when the cover was fixed using bolts and nuts, the ground around the frame had to be excavated. Therefore, at the installation site, if a step such as a curb on the sidewalk is formed in the opening direction of the lid, or if a street tree or the like is planted, the lid cannot be released sufficiently, and the frame is not opened. Since it is not possible to completely open the door, it is difficult for workers to enter and exit during maintenance inspection and repair inside the manhole, which may hinder the work.However, in the conventional case, change the opening direction of the lid to deal with it Is not easy. Further, even when the design or the like displayed on the surface of the lid has a direction, it is difficult to correct the direction according to the situation around the installation site. In addition, since the retaining ring is fixed to the frame by bolts, if a large external force acts on the retaining ring, the force will concentrate on the bolt, and the bolt will be broken or the screw thread will break, which will hinder attachment and detachment. There is fear. In addition, since the stopper protruding to the left and right of the lower end of the hinge fitting must be fitted according to the long hole of the retaining ring, when attaching and detaching the lid to the frame, erect the lid in the direction crossing the frame Work must be done. That is, the operator is forced to perform a detaching operation that requires a troublesome operation while straddling the opening of the frame, and there is a great risk of falling into the opening of the frame. In addition, since the retaining ring is fixed to the inside of the frame in a protruding manner, the effective inner diameter inside the frame is reduced, and the stopper and the retaining ring of the hinge bracket are used for turning or turning the lid when opening and closing. In many cases, a large resistance acts and the opening / closing operation cannot be performed quickly. Therefore, even after the receiving frame is installed, the direction of the lid body can be changed very easily, the effective inner diameter of the receiving frame is wide, and the opening / closing operation of the lid body and the attaching / detaching operation to the receiving frame are extremely easy and safe. There is a demand for a lid for an underground structure that can be carried out at any time. On the other hand, in order to satisfy the above-mentioned request, the present applicant, on June 20, 1991, formed a plurality of mounting cavities in the receiving frame to be opened inside the receiving frame, and attached or detached the seat to any of the mounting vacant portions. The hinge for the underground structure, which is provided so as to be capable of swinging and is provided with a stopper part which is locked at the lower surface of the receiving seat at the lower end, is provided. It was proposed as Utility Model Registration Application No. 54946. However, since the lid for the underground structure has only the pivot pin of the seat inserted in the support groove formed in the side wall of the mounting space, the seat is tilted or rotated, or the receiving frame is rotated. When the hinge moves up and down when the lid body is turned or swiveled to open and close the door, the seat itself also moves up and down and turns, and the pivot pin is disengaged from the support groove and There was a risk that the seat would come off from the mounting space.

[0004]

DISCLOSURE OF THE INVENTION The present invention has been proposed in view of the above, and has a lid body provided with a hinge that oscillates downwardly, and a receiving frame in which the lid body can open and close an opening. The receiving frame is provided with a plurality of mounting cavities opened inside the receiving frame and formed with bearing holes in left and right side walls, and left and right support shafts fitted into the bearing holes are locked by a holding frame body. A seat is detachably provided in any of the above-mentioned mounting cavities, and a lower end of a hinge provided on the lid body is provided with a stopper portion which is engaged with a lower surface of the seat when mounted on the seat. It is characterized by having.

[0005]

In the lid for an underground structure according to the present invention, the receiving seat can be attached to any of the plurality of mounting cavities provided in the receiving frame. At this time, the support shaft is fitted into a bearing hole formed in the mounting space, and serves as a tilt center of the receiving seat. Further, in order to prevent the support shaft from falling out of the bearing hole, the support shaft is locked by a holding frame. Then, a hinge structure for opening and closing the lid body is formed by inserting a hinge, which is vertically swingably mounted on the lid body, through a seat attached to the mounting space. The stopper at the lower end of the hinge is for preventing the hinge from coming off the seat. If the catch is provided so that it can be tilted upward only from a substantially horizontal state, when the stopper of the hinge abuts against the lower surface of the catch during the opening operation of the lid body, the catch is raised by the stopper. It can be tilted upward in the state. The receiving seat is provided with a passing space, a locking space, and a connecting space, and an inclined portion is formed on an inner surface facing the passing space, and a lower surface of the locking portion substantially coincides with an upper surface of the stopper portion. Some of them have an arcuate concave surface. The passage space is for inserting or removing the hinge from the seat, and is the only part through which the stopper at the lower end of the hinge can pass. An inclined portion is individually formed on the opposing inner surface of the passage space so that the hinge can be passed only when the hinge is inclined and moved up and down. The communication space is a portion that becomes a passage when the hinge inserted into the receiving seat moves between the passage space and the locking space. The locking space is a portion for locking the hinge so that the hinge does not come off the seat. Here, the main body of the hinge can be moved up and down and rotated, but cannot pass through the stopper at the lower end. Further, by forming an arc-shaped concave portion on the lower surface of the locking hollow portion, the hinge can be smoothly rotated even when the upper surface of the stopper portion is in contact with the lower surface of the locking hollow portion.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. The underground structure lid 1 according to the present embodiment includes an annular receiving frame 2 and a lid body 3 that closes an opening of the receiving frame 2 so that the opening can be opened and closed.

[0007] The receiving frame 2 has an inclined fitting portion 4 whose diameter is slightly reduced downward on the inner peripheral surface, and a mounting space portion 5 facing the side wall portion below the inclined fitting portion 4, 5 'is provided. As shown in FIGS. 3 to 6, the mounting space 5 has a front opening surface 6 opening inside the receiving frame 2, and a rearward bulging portion extending toward the outer periphery of the receiving frame 2. Each has a bearing hole 7 and a projection 37 for holding the receiving seat 10 substantially horizontally is formed on the rear wall.

The above-mentioned bearing hole 7 is a circular blind hole extending in the lateral direction from the surface of the side wall, into which the tip of a support shaft 31 of the receiving seat 10 described later is fitted. And
At the upper edge of the front opening surface 6 of the mounting cavity 5, the mounting cavity 5
A locking piece 8 shorter than the lateral width of the locking piece 8 is provided downward, and has a gap 9 between the left and right ends of the locking piece 8 and the side wall of the mounting space 5. The other mounting space 5 ′ is used as a lock seat for locking a lock (not shown) provided on the lid body 3.

As shown in FIGS. 7 to 12, the seat 10 mounted on one of the mounting cavities 5 and 5 'is a frame member having a substantially planar quadrilateral shape. A protruding portion 13 is formed on the upper surface on the base end side of the left and right side portions 12 extending from the left and right edges, and a lateral shaft insertion hole 14 for inserting a support shaft 31 is formed in the protruding portion 13. ing. The passage space 1 is located on the base end 11 side of the cavity of the seat 10.
5 is provided, and a locking space 17 is provided on the distal end portion 16 side. Further, the communication space 18 that connects the passing space 15 and the locking space 17 is formed in the longitudinal direction of the seat 10. Is formed.

Below the left and right side portions 12 of the passage space 15 opposite to each other, a first inclined surface 19 and a second inclined surface 20 inclined in the same direction as shown in FIGS.
And an arcuate concave surface 21 is formed on the lower inner peripheral surface of the locking cavity 17.

A guide projection 30 is provided on the receiving seat 10 on the left and right sides of the upper surface of the distal end portion 16, and a fastening portion 32 which is a female screw portion is formed substantially at the center of the proximal end portion 11. The holding frame 33 is detachably attached. Further, the holding frame 33 is for preventing the support shaft 31 from coming off when the receiving seat 10 is attached to the mounting space 5, and has a base 34 along the inner surface of the base end portion 11 of the receiving seat 10. At both ends of the shaft insertion holes 14 along the inner surface proximal end of the side portion 12.
The holding frame 33 is fitted to the positions of the base end portion 11 and the inner surface on the base end side of the side portion 12 in a flat U-shape provided with a side portion 35 located on the inner surface side of the base portion 34. The fixing rod 36, which is a bolt rod, is screwed to the fixing part 32 to be fixed to the receiving seat 10. 38 is the fastening rod 3
6 is a washer for preventing loosening.

A hinge 22 for connecting the lid body 3 for opening and closing the opening of the receiving frame 2 is mounted on the seat 10, and the hinge 22 is provided at one side edge of the lid body 3. The upper end is pivotally suspended and vertically suspended in a vertical rod shape, and lateral shafts 23 project from left and right side surfaces of the upper end, and are provided on the lower surface of one side edge of the lid main body 3 so as to face each other. By mounting the shaft 23 in the support groove 25 of the bearing plate 24 and supporting the shaft 23 with a stopper 26 fitted in the support groove 25, the hinge 22 is swung in the front-back direction with the shaft 23 as a fulcrum. Support as much as possible.

[0013] Below the hinge 22, a locking portion 27 facing the outside of the lid body 3 and a stopper portion 28 having an enlarged diameter at the lower end are provided integrally. The stopper portion 28 has a flat lower surface and a hemispherical upper surface portion 29. In the state where the opening of the receiving frame 2 is closed by the lid body 3, that is, when the hinge 22 is hung down below the horizontal lid body 3 by the shaft 23, the hinge 22 is locked by its own weight as shown in FIG. 17. The locking portion 27 is located just below the locking piece 8 of the receiving frame 2, while the locking portion 27 is inclined such that it protrudes slightly outward from the outer edge of the lid body 3. In addition, a stopper 28 at the lower end of the hinge 22 partially enters the mounting space 5.

The underground structure lid 1 of the present embodiment has the above-described configuration, and includes a mounting space 5 for the receiving frame 2,
When attaching the seat 10 to any of the 5 '
Is inserted from the front opening surface 6 into the inside of the mounting cavity 5 so that the shaft insertion hole 14 and the bearing hole 7 are held in alignment with each other.
So that the front end of the support shaft 31 protrudes into the bearing hole 7 so that the inner surface of the side portion 12 and the rear end surface of the support shaft 31 are flush with each other. Then, as described above, the holding frame 33 is positioned on the inner surface side between the base end portion 11 and the base end side of the side portion 12,
The holding frame 33 is fixed to the receiving seat 10 by screwing the fastening rod 36 to the fastening portion 32, and is supported by being positioned on the inner surface side of the shaft insertion hole 14 at each side 35 of the holding frame 33. Axis 3
Prevent 1 from coming off

When the holding frame 33 is fixed on the inner surface side of the receiving seat 10 as described above, the tip of the support shaft 31 is
The receiving seat 10 can be smoothly rotated in the vertical direction with the left and right support shafts 31 as fulcrums. However, since the base portion 11 abuts on the projection 37 formed on the rear wall of the mounting space 5, the receiving seat 10 is in a substantially horizontal state due to its own weight and cannot tilt downward, but tilts upward. be able to.

Hereinafter, a case will be described in which the hinge 22 which is swingably hung on the lower surface of the lid body 3 is inserted into the receiving seat 10 mounted on the inner surface of the receiving frame 2 as described above. That is, hinge 2
The hinge body 22 is suspended from the lower edge of the lid body 3 with the cover body 3 attached vertically in a hanging state, and the stopper portion 28 of the hinge tool 22 passes through the passage space 15 of the seat 10 from above. Let it. At this time, since the lower surface of the stopper portion 28 is flat and the upper surface portion 29 is hemispherical, there is no need to perform the attachment / detachment work by erecting the lid body in the direction crossing the opening of the receiving frame 2 as in the related art. The worker can work while standing on the ground surface outside the receiving frame 2. However, as shown in FIG. 14, the first inclined surface 19 and the second inclined surface 20 are formed on the left and right below the passage space 15, so that the stopper 28 passes below the passage space 15. In such a case, the hinge 22 is connected to the first inclined surface 19 or the second inclined surface 19.
It is necessary to shift or incline the inclined surface 20 by the amount of the inclination, and the stopper portion 28 cannot pass through the passage space 15 by simply moving the hinge 22 vertically.

Therefore, in this embodiment, the axis 2 of the hinge 22 is
By providing a slight clearance in the support portion of the hinge 3, the hinge 22 can swing not only in the forward and backward directions but also slightly in the left and right directions. Therefore, when the stopper part 28 of the hinge 22 is slowly inserted into the passage space 15,
When the hinge 22 slightly touches left and right, the stopper portion 28 slides along the second inclined surface 20, escapes to the first inclined surface 19 side, descends to a predetermined position, and inserts the hinge 22 into the seat 10. You can wear it.

When the hinge 22 is detached from the seat 10, the lid body 3 is slowly raised so that the stopper 28 is made to follow the first inclined surface 19. Since this operation requires an extremely delicate operation artificially, after the hinge 22 is attached to the passage space 15, the stopper 28 is erroneously moved from the passage space 15 by the normal opening and closing operation of the lid body 3. Never leave.

When the hinge 22 is mounted on the seat 10 and the lid body 3 is closed in the opening of the receiving frame 2 as described above, the hinge 22 is suspended from the lid body 3 as shown in FIG. And is slightly deviated from the passage space 15 of the receiving seat 10 toward the base end portion 11. At this time, the locking portion 2 of the hinge 22
7 is located immediately below the locking piece 8 of the receiving frame 2, the lift is applied to the lid main body 3 by the water pressure inside the underground structure or the like, and even if the lid main body 3 tries to rise, the locking portion 7 By locking the locking piece 27 to the locking piece 8, the lid main body 3 is prevented from coming off the receiving frame 2. Since the holding frame 33 has a flat U-shape, it does not come into contact with the hinge 22 in this state, and does not hinder the operation of the hinge 22.

When the lid main body 3 is closed in the receiving frame 2 and one side edge of the lid main body 3 is lifted up with, for example, a bar or the like and moved in the horizontal direction while being pulled up, as shown in FIG.
2 moves from the passage space 15 of the seat 10 through the communication space 18 to the locking space 17, and the stopper 28 engages with the lower surface of the locking space 17. Hinge 22
And the receiving seat 10 are moved by a length substantially equivalent to the length of one side edge of the receiving frame 2.
Is located on the upper surface. In this state, when the lid main body 3 is turned in the horizontal direction with the hinge 22 as a center fulcrum, the upper surface portion 29 of the upper surface of the stopper portion 28 coincides with the arc-shaped concave surface 21 of the lower surface of the locking cavity 17 of the receiving seat 10. Because the lid body 3
As shown in FIG. 19, the receiving seat 10 tilts upward, so that the lid main body 3 can smoothly turn. In addition, by turning it 180 degrees, the receiving frame 2 can be sufficiently opened. In addition, in FIG. 19, the hinge 22 moves from the locking space 17 of the seat 10 toward the passing space 15, and the hinge 22 appears to be separated from the seat 10.
Since the upper surface portion 29 of the stopper portion 28 of the hinge 22 faces the arcuate concave surface 21 on the lower surface of the locking cavity 17, the stopper 28 cannot move.
However, there is no possibility that the member will be detached from the seat 10.

In the case where the lid body 3 is turned 180 degrees in the vertical direction with the hinge 22 as the center fulcrum from the state shown in FIG. 18, the hinge 22 rises as shown in FIG. Are tilted upward, and the receiving frame 2 can be opened sufficiently large. When the lid body 3 is closed, the lower end edge of the lid body 3 is
Since it can be moved while sliding on the zero, it is easy to perform positioning and closing operation is also easy.

As described above, in the lid 1 for the underground structure of the present embodiment, the opening and closing of the lid main body 3 is performed by the cooperation of the hinge 10 and the receiving seat 10 tilting upward. Even if the length is shorter than the conventional one, a sufficient operating range can be secured. For this reason, the lower end of the hinge 22 can be prevented from protruding from the lower surface of the receiving frame 2. Since it can be installed in a place where there is no dimensional allowance, there are few restrictions on the installation place, which is convenient. In addition, since the mounting cavities 5 and 5 ′ opened in the receiving frame 2 are provided to face each other,
The mounting and dismounting of the seat 10 can be easily changed even after the receiving frame 2 is installed. That is, the mounting position of the lid main body 3 can be easily changed. Since the bearing hole 7 for receiving the support shaft 31 of the seat 10 is provided in the side wall of the space 5 so as to make it difficult for soil and the like to enter, the seat 10 can be tilted smoothly. At this time, since the base end 11 of the seat 10 is made to contact the projection 37 on the rear wall of the mounting space 5, the seat 10 can be tilted from a horizontal position to an upper position. Since the receiving seat 10 is provided with the passage space 15 through which the stopper portion 28 of the hinge 22 hanging from the lid main body 3 passes, the lid main body can be attached to and detached from the receiving seat 10. At this time, since the stopper portion 28 has a hemispherical upper surface, the attachment / detachment operation can be performed while standing outside the receiving frame 2 without straddling the opening of the receiving frame 2. Further, with the lid body 3 closing the opening of the receiving frame 2, the locking portion 2 of the hinge 22 is closed.
7 is located immediately below the locking piece 8 of the receiving frame 2, it is possible to prevent the lid main body 3 from floating even when a lift is applied.
Further, when the lid body 3 is pivoted to be released from the receiving frame 2, the upper surface of the stopper portion 28 of the hinge 22 coincides with the arcuate concave surface 21 of the locking space 17 of the receiving seat 10, so that the pivoting of the lid body 3 is smooth. Can be done. In addition, when the lid body 3 is opened by turning or reversing, the receiving seat 10 is tilted upward, so that the effective inner diameter of the opening of the receiving frame 2 is widened, so that the worker can easily enter and exit.

Although the present invention has been described in detail with reference to the embodiment of the drawings, the present invention is not limited to the above-described embodiment, and does not change the configuration described in the claims for utility model registration. It can be implemented in any way. For example, in the present embodiment, two mounting cavities are provided facing the inner surface of the receiving frame in consideration of the use of the other mounting cavities 5 'as lock seats, but in the present invention, two or more mounting cavities are provided. It suffices if there are, and the number and interval are not limited. Further, the holding frame body is formed in a flat U-shape and fixed to the receiving frame with a fastening rod, but it is only necessary to prevent the support shaft from coming off, and the shape and fixing means are not limited. .

[0024]

As described above, according to the present invention, the present invention comprises a lid body provided with a hinge that oscillates and a receiving frame for closing the lid body so that the lid body can be opened and closed.
A plurality of mounting cavities that open inside the receiving frame are formed, and a receiving seat is detachably provided in any of the mounting vacancies. At the lower end of the above-mentioned hinge, there is a stopper portion that is locked to the lower surface of the receiving seat. Also provided in the seat are a passage space through which the stopper of the hinge can pass, a locking cavity in which the stopper cannot pass and the hinge is locked, and a passage space and a locking cavity as described above. Is provided, so that the direction of the cover main body can be easily changed by changing the mounting position of the receiving seat even after the receiving frame is installed. Therefore, when there is a curb or a tree in the turning direction or the reversing direction of the lid body, which causes an obstacle, the above-mentioned obstacle can be solved only by changing the position of the seat and changing the position of the opening fulcrum of the lid body. If the design of the lid body is directional and does not match the direction of the road surface, the position of the seat can be changed to change the design state of the lid body. Moreover, in such a case, since the upper surface portion of the stopper portion is formed in a hemispherical shape, the lid body can be attached and detached without straddling the receiving frame, which is safe.

Further, since the seat is tilted upward from the horizontal state, the projecting length of the seat into the receiving frame becomes short when the lid body is opened, so that the effective inner diameter of the receiving frame becomes large, and Not only is it easier and safer to enter and exit,
It is also possible to carry large maintenance and inspection equipment into and out of the manhole. In addition, there is an effect that even if the seat is lost or damaged, only the seat can be replaced while the receiving frame remains unchanged. Further, when the lid body is pivoted to be released from the receiving frame, the upper surface of the stopper portion of the hinge coincides with the arc-shaped concave surface of the locking cavity of the seat, so that the lid body can be smoothly pivoted.

Further, bearing holes are formed in left and right side walls of the mounting space, and left and right support shafts are fitted in the bearing holes, and the receiving frame in which the support shaft is locked by a holding frame is the mounting space. Because it is detachably mounted on any of the parts, it does not come off or fall out of the mounting space even if force or rotational force acts on the seat in any direction, and it also catches earth and sand And has a high practical value because it can withstand long-term use.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a receiving frame of the present invention.

FIG. 2 is an enlarged plan view of a part of a receiving frame.

FIG. 3 is an exploded perspective view of a main part.

FIG. 4 is a front view in which a part of a mounting space is cut away.

FIG. 5 is a sectional view taken along line AA of FIG. 4;

FIG. 6 is a sectional view taken along line BB of FIG. 4;

FIG. 7 is a plan view of the seat as viewed from above.

FIG. 8 is a bottom view of the seat.

FIG. 9 is a right side view of the seat.

FIG. 10 is a left side view of the seat.

FIG. 11 is a sectional view taken along the line CC of FIG. 7;

FIG. 12 is a sectional view taken along the line DD of FIG. 7;

FIG. 13 is a sectional view taken along the line E-E of FIG. 7;

FIG. 14 is a sectional view taken along line FF of FIG. 7;

FIG. 15 is a sectional view taken along line GG of FIG. 7;

FIG. 16 is a longitudinal sectional side view of a part of a state where a receiving frame, a receiving seat, and a lid main body are separated.

FIG. 17 is a longitudinal sectional side view of a part of a state where a receiving frame, a receiving seat, and a lid main body are assembled.

FIG. 18 is a longitudinal sectional side view of a part when the lid body is opened.

FIG. 19 is a partial longitudinal side view when the lid main body is turned 180 degrees in the horizontal direction.

FIG. 20 is a partial vertical cross-sectional side view when the lid main body is inverted in the vertical direction by 180 degrees.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Underground structure lid 2 Receiving frame 3 Lid body 5 Mounting space 6 Front opening surface 7 Bearing hole 10 Receiving seat 11 Base end portion 12 Side portion 14 Shaft insertion hole 15 Passing space 16 Tip end 17 Locking space 18 Connecting space 22 Hinge 28 Stopper 31 Support shaft 33 Holding frame 36 Stopping rod 37 Projection 38 Washer

Claims (3)

(57) [Scope of request for utility model registration] 1. A lid body provided with a hinge that oscillates and suspended, and a receiving frame that closes an opening so that the lid body can be opened and closed. A plurality of mounting cavities having bearing holes formed in the side walls thereof, and a receiving seat in which the left and right support shafts fitted into the bearing holes are locked by a holding frame body are detachably provided in any of the mounting cavities, A lid for an underground structure, wherein a stopper is provided at a lower end of a hinge provided on the lid main body, the stopper being locked to a lower surface of the receiver while being mounted on the receiver. 2. The underground structure lid according to claim 1, wherein the seat is provided so as to be tiltable only upward from a substantially horizontal state. 3. The receiving seat provided on the receiving frame includes a passage space through which the stopper of the hinge can pass, and a locking cavity through which the stopper cannot pass and which rotatably locks the hinge. And a communication cavity communicating the passage cavity and the locking cavity. An inclined portion is individually formed on the inner surface of the passage cavity facing the upper surface, and the hinge is vertically inclined. If you move it, you can pass it,
3. The underground structure lid according to claim 1, wherein an arc-shaped concave surface substantially matching the upper surface of the stopper portion is formed on a lower surface of the locking cavity.